H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 49)

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Figure 10 MLD snooping related ports
The following describes the ports involved in MLD snooping, as shown in Figure 10 :
• Router port—Layer 3 multicast device-side port. Layer 3 multicast devices include designated
routers and MLD queriers. In
Figure 10 , GigabitEthernet 1/0/1 of Device A and Device B are router
ports. The Layer 2 device registers all its local router ports in its router port list.
Do not confuse the "router port" in MLD snooping with the "routed interface" commonly known as
the "Layer 3 interface." The router port in MLD snooping is the Layer 2 interface.
• Member port—Multicast receiver-side port In Figure 10 , GigabitEthernet 1/0/2 and
GigabitEthernet 1/0/3 of Device A and GigabitEthernet 1/0/2 of Device B are member ports. The
Layer 2 device registers all the member ports on the local device in its MLD snooping forwarding
table.
Unless otherwise specified, router ports and member ports in this document include static and dynamic
ports.
NOTE:
On an MLD snooping-enabled Layer 2 device, the ports that received MLD general queries with the source
address other than 0::0 or IPv6 PIM hello messages are dynamic router ports.
Compared with a common Layer 2 device, an access controller has wireless interfaces. The port roles on
the access controller in Figure 11 are described as follows:
• Router port—GigabitEthernet 1/0/1 on the access controller leads the device towards the
multicast source, so GigabitEthernet 1/0/1 is a router port.
• Member port—GigabitEthernet 1/0/2 on the access controller is attached with a multicast receiver,
so GigabitEthernet 1/0/2 is a member port. In addition, after an AP joins an ESS, the access
controller creates a virtual Layer 2 interface WLAN-DBSS corresponding to that ESS. As shown
in
Figure 11 , after the AP joins two ESSs, the access controller creates two virtual Layer 2 interfaces:
WLAN-DBSS 67:67 and WLAN-DBSS 68:66. The ESS corresponding to WLAN-DBSS 67:67
comprises a multicast receiver Client B, so WLAN-DBSS 67:67 is a member port.